Sit-up exercise device



FIG. 1 is a perspective view of a sit-up exercise device showing my newdesign;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a front elevational view thereof shown partially in fragmentfor ease of illustration;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is another front perspective view thereof with the cushionmembers shown in an exploded condition.

The ornamental design for a sit-up exercise device, as shown anddescribed.